<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Airplane Window</title>
    <link rel="stylesheet" href="demo.css" />
  </head>
  <body>
    <input type="checkbox" class="toggle" />
    <div class="window">
      <div class="curtain"></div>
      <div class="clouds">
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
      </div>
    </div>
  </body>
</html>
